Antenna



FIG. 1 is a front perspective view of an antenna according to our design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a left side elevation view thereof, the right side elevation view being a mirror thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof.

The broken lines in the drawings show environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 